<template>
    <view
        :style="customStyle"
        :class="`wd-drop-menu ${customClass}`"
        @click.stop="noop"
        :id="dropMenuId"
    >
        <!-- #ifdef MP-DINGTALK -->
        <view :id="dropMenuId">
            <!-- #endif -->
            <view class="wd-drop-menu__list">
                <view
                    v-for="(child, index) in children"
                    :key="index"
                    @click="toggle(child)"
                    :class="`wd-drop-menu__item ${child.disabled ? 'is-disabled' : ''} ${child.$.exposed!.getShowPop() ? 'is-active' : ''}`"
                >
                    <view class="wd-drop-menu__item-title">
                        <view class="wd-drop-menu__item-title-text">
                            {{ getDisplayTitle(child) }}
                        </view>
                        <wd-icon
                            :name="child.icon"
                            :size="child.iconSize"
                            custom-class="wd-drop-menu__arrow"
                        />
                    </view>
                </view>
            </view>
            <slot />
            <!-- #ifdef MP-DINGTALK -->
        </view>
        <!-- #endif -->
    </view>
</template>
<script lang="ts">
export default {
    name: 'wd-drop-menu',
    options: {
        virtualHost: true,
        addGlobalClass: true,
        styleIsolation: 'shared',
    },
}
</script>

<script lang="ts" setup>
import { getCurrentInstance, inject, onBeforeMount, ref, watch } from 'vue'
import { closeOther } from '../common/clickoutside'
import { type Queue, queueKey } from '../composables/useQueue'
import { getRect, uuid } from '../common/util'
import { useChildren } from '../composables/useChildren'
import { DROP_MENU_KEY, dropMenuProps } from './types'

const props = defineProps(dropMenuProps)
const queue = inject<Queue | null>(queueKey, null)
const dropMenuId = ref<string>(`dropMenuId${uuid()}`)
const offset = ref<number>(0)
const windowHeight = ref<number>(0)

const { proxy } = getCurrentInstance() as any

const { linkChildren, children } = useChildren(DROP_MENU_KEY)

linkChildren({ props, fold, offset })

watch(
    () => props.direction,
    (newValue) => {
        if (!['up', 'down'].includes(newValue)) {
            // eslint-disable-next-line quotes
            console.error(
                "[wot design] warning(wd-drop-menu): direction must be 'up' or 'down'",
            )
        }
    },
    { deep: true, immediate: true },
)

onBeforeMount(() => {
    windowHeight.value = uni.getSystemInfoSync().windowHeight
})

function noop(event: Event) {
    event.preventDefault()
    event.stopPropagation()
}

function getDisplayTitle(child: any) {
    const { title, modelValue, options, valueKey, labelKey } = child

    if (title) {
        return title
    }
    for (let i = 0, len = options.length; i < len; i++) {
        if (modelValue === options[i][valueKey]) {
            return options[i][labelKey]
        }
    }
    console.error(
        '[wot-design] warning(wd-drop-menu-item): no value is matched in the options option.',
    )
}

function toggle(child: any) {
    // 点击当前 menu, 关闭其他 menu
    if (child && !child.disabled) {
        if (queue && queue.closeOther) {
            queue.closeOther(child)
        } else {
            closeOther(child)
        }
        fold(child)
    }
}

/**
 * 控制菜单内容是否展开
 */
function fold(child: any) {
    getRect(`#${dropMenuId.value}`, false, proxy).then((rect) => {
        if (!rect) return
        const { top, bottom } = rect
        if (props.direction === 'down') {
            offset.value = Number(bottom)
        } else {
            offset.value = windowHeight.value - Number(top)
        }
        child.$.exposed!.toggle()
    })
}
</script>

<style lang="scss" scoped>
@import './index.scss';
</style>
